IZIHLAHLA ZOKUGUQULA

Yini ama-bushings?

Izihlahla zikagesi ziyizingxenye ezibalulekile zohlu olubanzi lwemishini kagesi njengama-transformer, ama-shunt reactor kanye nama-switchgears. Lawa madivaysi ahlinzeka ngomgoqo wokuvikela odingekayo phakathi kwekhondaktha ephilayo kanye nendikimba yokuqhuba yezinto zikagesi ezisezingeni eliphansi. Lo msebenzi obalulekile uvumela ama-bushings ukuthi athwale i-current ku-voltage ephezulu ngokusebenzisa umgoqo we-conductive wezindawo ezivaliwe zemishini. I-JIEOZU bushings iklanyelwe ukuvimbela ukuhluleka kukagesi kusuka ekukhanyeni noma ekubhobozeni, ukukhawulela ukuphakama kokushisa ngesilinganiso samanje, kanye nokumelana namandla emishini kusukela ekulayisheni kwekhebula kanye nokwanda okushisayo.

I-insulation yangaphakathi ye-bushing kumele imelane nezingcindezi zikagesi ezizobhekana nazo enkonzweni. Lezi zingcindezi zibangelwa umehluko ongaba khona we-voltage kusuka ku-conductor onikwe amandla kuya ezingxenyeni ezisekelwe phansi i-bushing edlula kuzo. Ekusetshenzisweni kwamandla kagesi aphakathi nendawo naphezulu, okokufaka kwangaphakathi kufanele futhi kukhawulele ukuqaliswa kwe-partial discharge (PD) engase ithuntubeze kancane kancane izakhiwo namandla okufakwa ngaphakathi.

I-insulation yangaphandle ye-bushings inezici ezithile zokuklama ezifana nenani lamashedi kanye nebanga le-creepage ukunikeza ukwehlukana phakathi kwezindawo zokuxhuma ze-HV ezinamandla namandla aphansi angaphandle kwengxenye. Inhloso yalezi zici ukuvimbela i-arcing eyomile (i-flashover) ne-creep (ukuvuza). I-Dry Arcing, elinganiselwe yi-BIL, idinga ibanga elanele ukuze ibhasi likwazi ukumelana nomfutho kagesi ekushintsheni nasekushayeni kombani. Lezi zenzakalo zingabangela ukwehluleka kwe-flashover lapho i-arc kagesi yakheka isuka ku-conductor ye-HV ngokuqondile iye phansi uma ibanga linganele ku-voltage. I-Creep (Ukuvuza) kwenzeka lapho ukungcola kukhula phezu kwehlathi futhi kunikeza indlela yokuhambisa ukuze kulandele umsinga endaweni. Ukufakwa kwamashedi ekwakhiweni kwezihlahla kukhulisa ngempumelelo ibanga lehlathi phakathi kwetheminali ye-HV kanye nomhlabathi ukuze kuvinjelwe ukulahleka kwe-creepage.

I-JIEZOU ikhiqiza ama-epoxy bushings angaphakathi nangaphandle ukuze asebenzise i-switchgear, i-transformer & amandla kagesi kuwo womabili amakilasi kagesi aphansi naphakathi. Ama-Bushing ethu aklanywe futhi avivinywa ukuze ahlangabezane namazinga asebenzayo e-CSA, IEC, NEMA, kanye ne-IEEE.

I-Low Voltage Bushings ilinganiselwa ku-voltage afika ku-5kV/60kV BIL kanti ama-Medium Voltage bushings alinganiselwe ku-voltage afika ku-46kV/250kV BIL.

I-JIEZOU yenza i-Epoxy bushings, ethatha indawo ephelele ye-Porcelain Bushings futhi inezinzuzo eziningi. Bheka isihloko sethu esithi Epoxy Bushings vs Porcelain Bushings

Ukutshala ama-transformers

I-transformer bushing iyisivikelo esivumela i-conductor enamandla, ephethe okwamanje ukuthi idlule ethangini eliphansi le-transformer. I-Bar-Type Bushing ine-conductor eyakhelwe ngaphakathi, kuyilapho i-Draw-Lead noma i-Draw-Rod Bushing inenhlinzeko yokuthi i-conductor ehlukile izofakwa phakathi nendawo yayo. Izihlahla eziqinile (uhlobo lwenqwaba) kanye nezihlahla ezisezingeni eliphezulu (uhlobo lwe-condenser) ziyizinhlobo ezimbili eziyinhloko zokwakha izihlahla:

Izihlahla eziqinile ezine-porcelain noma i-epoxy insulator zivame ukusetshenziswa njengezindawo zokuxhuma ukusuka ohlangothini olumazombezombe oluphansi lwe-transformer ukuya ngaphandle kwe-transformer.
Ama-bushings asezingeni eliphezulu asetshenziswa kuma-voltage aphezulu wesistimu. Uma kuqhathaniswa nezihlahla eziqinile, ziyinkimbinkimbi ekwakhiweni kwazo. Ukuze ubhekane nezingcindezi eziphakeme zikagesi ezikhiqizwa ngama-voltage aphezulu, ama-capacitance-graded bushings afakwe isihlangu esisezingeni elingaphakathi, esishunyekwe phakathi kwe-conductor ephethe yamanje emaphakathi kanye nesivikeli sangaphandle. Inhloso yalezi zihlangu eziqhutshwayo ukunciphisa ukukhishwa okuyingxenye ngokuphatha inkambu kagesi ezungeze umqhubi wesikhungo, ukuze ukucindezeleka kwensimu kugxilwe ngokulinganayo ngaphakathi kwe-insulation ye-bushing.

Ulwazi lomkhiqizo—1.2kV Plastic Molded Tri-clamp Secondary Bushing